Text To Speech Engines

Audio
Caller ID uses a Text To Speech (TTS) engine to announce
incoming callers. If you do not currently have a TTS
engine, you can download one for free from this page. To
find out if you already have a TTS engine installed,
select "File / Options... / Audio" from within
Audio Caller ID. If you have a TTS installed you will see
a list of available voices.